Based on an interferometric spatial autocorrelation of two shifted point-spread functions combined with confocal detection, we demonstrate that the point-spread autocorrelation function technique provides improved axial resolution compared with conventional confocal imaging. The principle of the technique is demonstrated for a one-sided f luorescing step object.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/19881779